Home » Symptoms » Dog Symptoms A-Z » Chronic Diarrhea

Chronic Diarrhea in Dogs

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

If the condition worsens / symptoms persist, consult a veterinarian.

Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity

Definition

ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. in dogs is a condition in which the dog has soft or watery stools over a prolonged period (usually longer than two to three weeks). This condition can indicate various underlying health problems and requires a thorough examination to determine the cause and start appropriate treatment.

Can Occur with the Following Diseases:

Basics and possible causes

Chronic diarrhea in dogs can be caused by a variety of factors affecting the digestive tract. The most common causes include food intolerances, infections, parasites, inflammatory bowel disease, tumors, and liver and pancreatic diseases.

Food intolerances or allergies occur when the dog’s immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. overreacts to certain components of the diet. These reactions can lead to inflammation of the intestines and thus to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. Common triggers include proteins from meat, dairy products, grains, and certain additives.

Infections caused by bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease., viruses, or fungi can also cause chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. For example, bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. such as Salmonella or viruses such as parvovirus can damage the intestinalIntestinal refers to the intestine, the part of the digestive tract that extends from the stomach to the anus. Intestinal diseases affect the small and/or large intestine. lining and triggerA trigger is a stimulus that elicits a specific reaction or state. In veterinary medicine, this can refer to emotional responses, such as fear or aggression, or medical conditions, such as seizures in dogs and cats. persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems..

Parasites such as Giardia or roundworms are other common causes of chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. These parasites can colonize the dog’s intestines and disrupt normal digestive function.

Inflammatory bowel disease (IBD) is a group of conditions in which the dog’s immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. attacks its own intestinalIntestinal refers to the intestine, the part of the digestive tract that extends from the stomach to the anus. Intestinal diseases affect the small and/or large intestine. wall, leading to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. inflammation and diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. The exact cause of IBD is often unknown but may include genetic and environmental factors.

Diseases of the liver or pancreasThe pancreas is an organ that produces digestive enzymes and hormones, including insulin. It plays an important role in digestion and blood sugar regulation. can also cause chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., as these organs play an important role in digestion. Insufficient production of digestive enzymesEnzymes are biological catalysts that accelerate specific chemical reactions in the body without being consumed. They play a crucial role in virtually all physiological processes. or impaired detoxification function can result in digestive problems and diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems..

Typical accompanying symptoms

Weight loss: With chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., the dog may lose weight because nutrients are not absorbed properly. This can lead to general weakness and reduced energy levels.
Vomiting: Some dogs with chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. also show vomiting, which can indicate a serious disorder of the digestive tract.
Flatulence: Excessive gas production in the intestines can lead to discomfort and abdominalThe term "abdominal" refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. pain. This is often an accompanying symptom of digestive disorders.
Loss of appetite: Dogs with chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. often lose their appetite, which can worsen the situation because important nutrients are not absorbed.
DehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse.: PersistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. fluid loss (dehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse.) can lead to dehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse., which is noticeable through dry mucous membranes, sunken eyes, and reduced skin elasticity.

When to see a vet?

Eskalation: ORANGE for blood, weight loss, , fever, vomiting, pain, or in puppies; RED for collapse, severe , or black tarry stool.

A veterinary visit is urgently needed if the diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. lasts longer than a few days or is accompanied by other serious symptoms such as vomiting, fever, blood in the stool, or extreme discomfort. These signs may indicate a more serious condition that requires immediate attention.

Especially in puppies, older dogs, or dogs with existing health problems, chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. should be addressed quickly, as these animals are more prone to complications such as dehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse..

If the dog shows signs of dehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse., such as sunken eyes or dry mucous membranes, a veterinarian should be consulted immediately to ensure appropriate treatment.

Symptom recognition for the pet owner and veterinary diagnostic procedure

For pet owners, it is important to monitor the dog’s bowel movements regularly. Pay attention to the consistency, color, and smell of the stool. If changes persist for more than a few days, it is advisable to contact a veterinarian.

The veterinarian will take a thorough medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. to identify possible causes of the diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. This includes questions about feeding, the dog’s environment, and any previous illnesses.

To determine the cause of chronic diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., various diagnostic tests may be necessary. These include blood tests, stool analyses, ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. examinations, or endoscopies to assess the condition of the digestive tract more precisely.

Stool samples can be tested for parasites, bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease., or other abnormalities. Blood tests can provide information about the dog’s overall health status and possible organ problems.

What the pet owner can do and professional therapy options

As a first step, the pet owner can try offering the dog an easily digestible diet to relieve the digestive tract. This can include, for example, cooked rice with chicken or special diet food recommended by the veterinarian.

Adequate fluid intake is crucial to prevent dehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse.. Offer your dog fresh water regularly and monitor how much they drink.

Avoid giving the dog medication without consulting the veterinarian, as some medications can worsen the condition or are unsuitable for the cause of the diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems..

Keep the dog in a calm, stress-free environment, as stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. can worsen the condition. Monitor their condition closely and note any changes so you can provide the veterinarian with accurate information.

In the long term, switching to a hypoallergenic or specially formulated food may be necessary to avoid food intolerances. However, this should always be done in consultation with the veterinarian.

Outlook on current research

Current research on chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrhea in dogs is increasingly focusing on the role of the gut microbiota, i.e., the community of microorganisms in the intestines. Scientists are studying how an imbalanceImbalance refers to an imbalance or disruption of normal function or composition in the body, which can lead to health problems. in this microbiota, known as dysbiosis, can lead to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. New studies suggest that certain probiotic strains may help restore a healthy microbiota and thereby relieve the symptoms of chronic diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. This research offers promising approaches for developing new treatment strategies tailored to the dog’s individual microbial composition.

Another area of research focuses on genetic factors that may make dogs susceptible to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. Some breeds appear to be predisposed, and researchers are trying to identify genetic markers associated with this susceptibility. Advances in geneticsGenetics is the science of genes, heredity, and the variation of organisms. It studies how genetic information is passed from generation to generation and how it influences the development, appearance, and behavior of living things. could make it possible to identify at-risk dogs early and take preventive measures to reduce the risk of chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems..

In the field of nutrition, researchers are investigating how special diets can contribute to treating chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. Researchers are evaluating the benefits of hypoallergenic diets, high-fiber formulas, and diets with specific fatty acid or proteinProteins are large molecules made up of amino acids and play an essential role in almost all biological processes. They are necessary for building body tissue, the function of the immune system, and as enzymes for metabolic reactions. content. The goal is to determine which nutritional strategies are most effective at relieving symptoms and improving the quality of life of affected dogs.

The use of biomarkers to diagnose and monitor chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. is another important area of research. Scientists are working to develop blood or stool tests that can identify specific biomarkers for chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. Such tests could enable veterinarians to diagnose more quickly and accurately and to monitor the success of treatment strategies more effectively.

In pharmacology, intensive work is being done to develop new medications that specifically target chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. Both herbal and synthetic active ingredients are being investigated to evaluate their effectiveness and safety. This research could lead to the discovery of new therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. options that have fewer side effects and are more effective than current treatments.

An interdisciplinary approach that brings together veterinarians, nutritionists, geneticists, and microbiologists is increasingly seen as necessary to understand and effectively address the complex causes of chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. in dogs. Sharing knowledge and methods across these disciplines promises to speed up the development of holistic treatment approaches.

Frequently asked questions

What is chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrhea in dogs? ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrhea in dogs is a persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. condition in which the dog has soft or watery stools for an extended period, usually longer than two to three weeks. It is a symptom, not a disease in itself, and can indicate various health problems.
How is chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. different from acuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.? AcuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. occurs suddenly and usually lasts only a few days, whereas chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. persists for weeks or longer. AcuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. is often due to short-term causes such as infections or dietary changes, while chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. can have more complex and long-lasting causes.
What symptoms accompany chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrhea? In addition to frequent, soft to watery stools, symptoms such as weight loss, loss of appetite, vomiting, flatulence, and general weakness may occur. Depending on the cause, fever and abdominalThe term "abdominal" refers to anything that concerns the belly or the abdomen. It is an adjectival expression used to describe the location, symptoms, or conditions that occur in the abdominal area. pain may also be present.
When should I take my dog to the vet? If the diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. lasts longer than 48 hours, there is blood in the stool, the dog seems lethargic, or shows other severe symptoms, a veterinarian should be consulted immediately. ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. always requires a veterinary examination.
Which diagnostic tests are common for chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.? The veterinarian may recommend blood tests, stool samples, X-rays, or ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. examinations. In some cases, endoscopies or biopsies are necessary to determine the cause of the diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. more precisely.
Can food intolerances cause chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.? Yes, food intolerances or allergies are common causes of chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. A special diet or eliminationElimination refers to the process by which waste products and toxins are removed from the body. This includes excretion via the kidneys (urine), intestines (stool), lungs (breath), and skin. diet can help identify the foods responsible and relieve diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems..
How can I treat my dog’s diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. at home? With mild chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., switching to an easily digestible diet of cooked chicken and rice can help. However, it is important to discuss any changes with a veterinarian, as an inappropriate diet could worsen the symptoms.
What role do probiotics play in treating chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.? Probiotics can help balance the intestinal flora / gut microbiotaThe intestinal flora / gut microbiota, also called microbiome, refers to the community of microorganisms that live in the digestive tract. A healthy intestinal flora / gut microbiota is crucial for digestion, the immune system, and the overall health of dogs and cats. and improve digestive health. They are often part of therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. for chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems., especially if dysbiosis is suspected. However, choosing the right probiotic should be done in consultation with a veterinarian.
Can stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. or psychologicalPsychological refers to anything related to the mind or behavior. In veterinary medicine, this can include the study of animal behavior, including stress responses and behavioral disorders. factors cause chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.? Yes, stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. and anxiety can contribute to chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. in dogs. Behavioral changes or environmental adjustments can help reduce stress-related diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems..
How long does it take for chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems. to improve? Recovery time depends on the underlying cause. If the cause is successfully treated, symptoms may improve within a few days to weeks. Ongoing support from the veterinarian is crucial for successful treatment.